Murphy is dealing with a calf injury, and hasn't progressed as much as the team initially anticipated. He'll be further evaluated Thursday. Murphy is hitting .301/.343/.424 over 528 at-bats.
Hosmer was able to take batting practice Thursday. There's a chance he could begin a rehab assignment as soon as this weekend. Hosmer has been sidelined since July 31 with a hand issue.
Mariot was in the minors, but was called up and placed on the DL. The move was made in order to free up a spot on the team's 40-man roster.
Joe Maddon said Smyly would likely be held between 150 innings and 160 innings. Smyly has already reached his career-high in innings, and currently sits at 141 1/3 on the year. Smyly has put up strong numbers, posting a 3.31 ERA, but he's never thrown more than 117 innings over a full season.
Samardzija will now move up a day and pitch Saturday. Kazmir will be pushed back to Sunday. Both players will take on the Angels. It's unclear if Kazmir was moved in order to give him more rest following a poor start, or if the team just wanted to adjust the pitching matchups based on who the Angels were throwing.
Matsuzaka has been sidelined since July 24 due to an elbow injury. He's been able to get through his rehab starts and is ready to return. Matsuzaka will take Vic Black's spot on the active roster.
Black received an injection in his neck in order to treat bone spurs. He'll need some time to recover following the injection. Black posted a 2.20 ERA over 32 2/3 innings.
Rios will miss the game due to a thumb injury. Rios indicated he wanted to play, but manager Ron Washington thought it was for the best to hold him out. Washington expects Rios to start Friday.
Castillo signed with the club recently, and has already obtained his work visa. He arrived at team headquarters in Florida Wednesday to begin workouts.
Arano has spent the season pitching at Class A Great Lakes for the Dodgers, where he has a 4.08 ERA and 83 strikeouts in 86 innings of work.